<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="test"></div>
    
    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>
    <script type="text/babel">
        class Weather extends React.Component {
            state = {ishot:false}
            render() {
                 return  <h1 onClick={this.change}>今天天气很{this.state.ishot?'炎热':'凉爽'}</h1>
            }
            
            change= ()=>{
                const ishot = this.state.ishot
                this.setState({ishot:!ishot})
            }

        }
        ReactDOM.render(<Weather/>,document.getElementById('test'))
        // function demo(){
        //     this.state.ishot = true 
        // }
    </script>
</body>
</html>